声像系统中数字信号滤波器的设计与实现

Design and Implementation of Digital Signal Filters in Acoustic Image System

针对数字基带信号脉冲的成形滤波原理、应用及实现做了研究,对数字成形滤波的应用意义做了介绍并分析了模拟和数字两种硬件实现的方法,研究了成形滤波函数的传输特性和传输系统信号的误码率,分析了本次设计中所使用到的数字成形滤波器设计的几种FIR滤波器结构,并进行仿真结果比较,最后根据实际应用的情况并结合设计仿真中出现的问题进行分析,得出各种设计结构的优缺点和适用性。

This paper studies the forming filter principle,application and implementation for digital baseband signal pulses,introduces the application significance of digital forming filter,analyzes two methods of analog and digital hardware implementation,studies the transmission characteristics of the forming filter function and the bit error rate of the transmission system signal,analyzes several FIR filter structures of the digital forming filter design used in this design,compares with the simulation results,and finally obtains the advantages,disadvantages and applicability of various design structures according to the actual application situation and combined with the problems in the design simulation.